Typewriting machine



Sept. 28

H. A. AVERY TYPEWRITING MAcHIhIs Filed March 31, 1923 3 Sheets-Sheet 1INVENTOR fleWAZZaLAVq V BY I k ATTORNEYS Sept. 28 1926. 1,661,489

' H. A. AVERY TYPEWRITING MACHINE Filed March 31. 1923 s Sheets-Shet 2fA TORNEYy Patented Sept. 28, 1926.

UNlTED STATES PATENT OFFICE.

HENRY ALLEN AVERY, or enoron, NEVJ YORK, assrenoa 'IO CORONA TYPEWRITERCOMPANY, Inc, or enoron, NEW YORK, A conrona'rron on NEW YORK.

TYPEWRITING MACHINE.

Application filed March 31, 1923.

This invention relates to improvements in typewriting machines, and hasfor its principal objects to provide a machine in which uselessoperation of the ribbon-feed ing and vibrating mechanism when thespace-bar is operated is avoided, thus e1iminating unnecessary wear andnoise and re lieving the operator of unnecessary labor;

to provide simple and elficient letter-feed, mechanism 1n whichprovision is made for operating the escapement from the printing keysand from a spacebar by independent sets of operating connections; toprovide adjustable space-bar-operated means for actuating a dog rocker,whereby the rocker may be moved equal distances by the space bar anduniversal bar; to provide simple and efficient space-bar-operated meansfor o aerating a dog-rocker which shifts with a platen-carriage and itssupport when changing case; and to provide a compactible machine havingseparable connections between a dogrocl er on one framepart and aspace-key mechanism and a universal bar mechanism on another frame part,which connections are automatically broken and restored by movement ofone frame part relatively to the other.

Other features and advantages will appear from the following descriptionof the preferred embodiment of the invention 11- lustrated in theaccompanying drawings.

in the drawings.

Figure 1 is a vertical longitudinal sectional view of a typewritingmachineembodying the present improvements;

Fig. 2 a detail sectional View showing the platen carriage and shiftframe elevated to their uppermost or fig. shift position:

Fig. 3 a detail sectional view showing the foldable frame part swungpartly toward Serial No. 629,091.

operating means controlled by the universal bar;

Fig. 6. a detail sectional view on the line 66 of Fig. 1; and

Fig. 7 a perspective viewof the ribbon vibrating mechanism. 7

The improvements are shown embodied in a Corona (model3) typewritingmachine, and only so much of said machine as is nec- 'essary to a fulland clear understanding of the invention is therefore shown anddecribed. The platen carriage 1 with the platen 5 thereon travels onbearings on the carriage bed 2, the carriage being normally urged inletter-feed direction by the usual spring drum and draw-band which arenot t'hown. An escapement rack 3 is secured to the carriage. The bed 2is rigidly secured on therear ends of the folding arms 4: pivotally heldat 6 at'their forward ends to the two forwardly extending, verticallyshiftable, frame bars 7. Bars 7 are rigidly held adjacent their rearends to the upper ends of the two vertically shiftable posts 8 which areslidably guided in brackets 9 mounted in the rear of the main or baseframe part 10 of the machine near opposite sides of the machine. Thelower ends of posts 8 are connected by a rod 11 which is guided vertically in slots 12 in brackets 13 mounted on frame part 10, the postsand rod being secured to each other by screws 14.

A dog rocker 15 which, except for the arm or extension 16 hereinafterdescribed, is of the same construction as in the Corona machine, ispivotally held by a pivot screw 17 to the carriage bed to rocktransversely of rack 3, said screw passing through a hole in boss 18 onthe rocker. The step-by-step letter-feed movement of the rack andcarriage is controlled by the usual rigid and limber dogs 19 and 20.,respectively, the rocker 15 being normally held by spring, 2? with itsinnerend engaging the rear face of an abutment 22 one bracket 23 held tothe carriage bed, in which position the limher dog engages withthe rack.

The dog rocker finger 24: is adapted to be engaged by a moat 25 011 thecross bar of a fore-ai ltl' racking frame 26 whenever a type key isdepressed to move the inner end of the dog rocker rearwardly and thusdisengage dog and engage dog 19 with the rack. The drop or feed takesplace as usual on the upstroke of the key on the return movement of the'dog rocker by spring 27 the forward end of which is held to a bracket28 on the carriage bed which supports part of the ribbon vibratingmeans. The depending arms of frame 26, which is of inverted U-shape, arepivotally held to rod 11 at the inner faces of brackets 13, and saidarms are provided with vertical slots 29 in which fingers 30 on theupper ends of levers 31 engage in all case shift positions of thecarriage. Levers 31 are connected at their upper ends by a transversebar 32 and are pivotally held by screws 33 to brackets 9 to swingfore-and-aft of the machine. Links 34 connect the lower ends of levers31 with the forwardly extending side arms of a U- shaped universal bar35, which arms are pivoted on one of the transverse key-lever pivot rods36 rigidly held to brackets 37 at the sides of frame part 10. Thetransverse member of the universal bar extends over the rear ends of allthe printing key levers 38 and is adapted to be rocked upwardly againstthe tension of a spring 39 by either of said key levers to force frame26 and tappet 25 rearwardly to actuate the dog rocker 15. The returnmovement of the frame 26 is limited by engagement of the tappet with arod 40 connecting frame bars 7.

The ink ribbon 41 is wound on spools 12 held to spindles 13 on posts 44Lsecured to folding arms 4, said spools being rotated by worm gears 15 onthe spindles meshing with worms 46 fixed on shafts 17 journalled inbrackets on arms i. Shafts l7 carry ratchet wheels 48 rotated by pawls4E9 pivoted at 50 on frame 26. The ribbon vibrator 51 is pivoted at 52on bracket 28 on the bed 2 and is connected at its inner end to theribbon guide 53 slidably held to a bracket 5% fixed on the carriage bed.Vibra tor 51 is actuated by a horizontally swinging oscillating means 55rocked by a finger '56 on frame 26, said finger engaging in a slot inthe oscillating device (see Fig. 7) and rocking said device about itspivot 57 on bracket 28 against the tension of a spring 58.

The frame parts l, 7, 8 and 11, and the devices mounted thereon, areVertically shiftable to vary the relation between the platen 5 and thetype bars 59 which are pivoted in a segment 60 mounted on frame part 16and connected with key levers 38 by links 61. To shift said parts a rockshaft 62 journalled at its ends on frame part 10 is provided, said shafthaving a rock arm 63 at one end connected with rod 11 and having a fig.shift key-lever 64 rigidly held thereto adjacent the other end there of,the rear end of key lever 64 being also connected to rod 11 A cap. shiftkey lever 65 is loosely pivoted on a reducer part 66 of shaft 62 and isnot connected at its rear end with rod 11, said lever, however, being inthe Corona machine formed with a cam at its rear end to operate a cap.shift stop device, not shown. Keylever 65is formed with a lug 67engaging under the rear arm of lever 6% to operate the shift mechanismthrough the medium of lever 6 1. A return spring 68 is provided forlever 65. 7 i

The foregoing parts with the exception of the dog rocker are allconstructed and operate as in the Corona machine referred to. Theimprovements will now be described. The space-bar 69 is supported on theforward ends of two spacing levers 7O rigidly affixed to a rock shat 71journalle'd at its ends in bracket 37, one of said levers having arearwardly extending stop arm carrying a sleeve-like rubber bumper 72 atits rear end normally held resting on top of rock-shaft 62 of thecase-shift mechanism by a space bar return spring 73 which connected atits ends with arm 70 and a bar 7st mounted on brackets 37. An upstandingsheet metal rock arm 75 is rigidly aliixed at its lower end to rockshaft '71 adjacent the left hand side of base frame part 10, said armbeing formed at its upper end with a rearwardly and downwardly extendingportion 75 bendable fore-andaft of the machine for purposes ofadjustment. Portion 75 is sufficiently stiti' to remain in the adjustedposition to which it may be bent. A rigid pull and push link 76 formedof stiff wire is formed with hook ends 77 passed through an aperture inthe lower end of port-ion 75 of arm 75 and an aperture substantiallymidway the ends of an upstanding sheet metal rock arm 78. Link 76 isthus pivotally held at its ends to the two upstanding rock arms and normally preferably extends slightly downward from its forward to its rearend.

Rock arm 78 extends up alongside the in nor face of left-hand frame bar7 and is formed with a forwardly extending ear 79 at its upper endprovided with a forwardly and downwardly turned guide slot 80 throughwhich passes the shank of a retaining and guiding screw 81 between thehead of which and bar 7 said car 79 is slidablv confined.

ii-O

Screw 81 holds rock arm 78 against lateral the adjacent post 8, theupper and lower parts of said rock arm being connected by a downwardlyand outwardly inclined portion 78. Rock arm 78 is formed with a forkedlower end 78 the legs of which extend downwardly at opposite sides ofthe elongated head of screw 14 and engage in a circumferential groove 82in the screw head. Arm 78 is thus detachably and pivotally held to theshift frame to move up and down therewith and rock fore-and-aftrelatively thereto, and is held against lateral movement at both ends.

At its upper end rock arm 78 is formed with a rearwardly extendingfinger 83 formed with an inwardly turned rear end part or hook atloosely engaging the rear edge of arm 16 of the dog rocker 15 at theleft side of pivot screw 17. Finger S3 is offset inwardly as shown toclear post 8, and it will be obvious that when space bar 69 is depressedsaid finger will pull arm 16 of the dog rocker forward, thus moving theinner or main dog-carrying body part of the rocker rearwardly. When thespace bar is released spring 73 will restore the space bar and rock arms7 5 and 78 and link 7 6 to their normal position which is determined bythe stop arm which engages shaft 62. It will thus be obvious that anactuation of the space bar will cause an operation of the escapement,the drop or feed taking place on the return stroke of the space bar. Bybending part 75 the arm'78 may be adjusted forwardly or rearwardly asmay be necessary to cause the same to properly act upon the dog rocker.

During case-shifting arm 78 moves with the shift-able frame part andmaintains its operative relation with the dog rocker in all threecaseshift positions of the platen. Link 76 swings about its forwardpivoted connection 77 with arm 7 5 during case-shift movements, and itsrear end moves from a normal lower-case position below the plane of saidforward pivot to an extreme fig. shift position above the plane of saidpivot.

hen the machine is compacted by swing ing arms 4 forwardly through anarc of 180 degrees to place the carriage in an inverted position overthe keyboard, the operating train between the printing keys and thefeeddogs of the escapement separates automatically, finger 24rof the dogrocker moving way from tappet 25 on rocking frame 26, while the ribbonfeed operating chain separates by movement of ratchets L55 away fromfeed pawl-s 49 on the rocking frame 26, and

the ribbon vibrator operating chain sepa-- rates by movement ofoscillator means 55 away from finger 56 on frame 26, all as in theCorona machine. The operating chain between the space bar and feed dogsis broken during compacting the machine, by movmerit of arm 15 of tli.dog rocker away from hook end 84 of finger 83 on rock arm 8, and allfour of the separable operating chains referred to are automaticallyrestored upon swinging the platen carriage and its pivoted support backto their normal position.

What I claim is:

1. In a typewriting machine, the combination of a platen carriage, acarriage support hinged to fold to' a compact inverted position over thekeyboardof the machine. an escapement dog rocker extending transverselyof the machine, means pivotally supporting said dog rocker intermediateits ends on the carriage support to swing horizontally, a universal bar,means operated by the universal bar for pushing rearwardly against saiddog rocker at one side of its pivot, a space bar, and means operated bythe space bar for pushing forwardly on the dog rocker at the oppositeside of its pivot, both said rocker pushing means having a looseabutting engagement only with the rocker.

2. In a typewriting machine, the combination of a main frame, a carriageshift frame, a platen carriage on said shift frame, escape mentmechanism for the carriage including a dog rock-er pivotally supportedon said shift frame, printing instrumentalities mounted on the mainframe, auniversal bar pivotally mounted on the main frame operable bythe printing instrumentalities. ribbon vibrating means operable by saiduniversal bar, a space bar pivotally mounted on the main frame, a pairof independent actuators mounted on the shift frame and each arranged tooperate the dog rocker without imparting motion to the other actuator,means connecting the universal bar with one of said actuators foroperating the actuator in all case positions of the shift frame, andmeans independent of said lastmentioned means connecting the space barwith the other actuator for operating said actuator in all casepositions of the shift frame.

3. In a typewriting machine, the combination of a .platen carriage, asupport for the carriage, a feed-dog rocker, means pivotally holding therocker to the support, a main frame, printing instrumentalities mountedon the main frame, means operated by the printing instrumentalitiesfor'actuating the dog rocker, a space bar, independent means operated bythe space bar for actuat ing'the dog rocker, and case-shift means forshifting the carriage support relatively to the main frame, both of saiddog-hacker actuating means having relatively shifrable part-s mounted onthe main frame and the carriage support, said carriage supportcomprising a frame part movable by the case shift means carrying theshiftable parts of the dog rocker actuating means and a frame partcarrying the platen carriage and dog rocker and connected with theshiftable frame part to shift therewith to change case and to foldrelatively thereto to compact the machine, said dog rocker moving intoand out of cooperative relation with its actuat ing means automaticallywhen the machine is extended and compacted.

4. In a typewriting machine, the combination of a main frame, printinglDStTUETiQTr talities on the main frame, a platen carriage, a supportfor the carriage shiftablc relatively to the main frame to compact themachine, a universal bar on the main fr cv operable by the printing);in'strumentaht' es, a ribbon vibrator and ribbon spools on the shiftablesupport, an escapeinent dog rock r on the shiftable support, separableopei ating connections between the universal bar and said ribbonvibrator and spools and dog rocker, a space bar on the main frame, andmeans forming a separable operating connection between said space barand dog rocker wholly independent of the connection between theuniversal bar and dog rocker.

5. In a typewriting machine, the combination of a main frame, printinginstrun'ientalities on the main frame, a platen carriage,

a support for the carriage shiftabl-e re1atively to the main frame tocompact the machine, a universal bar on the main frame operable by theprinting instrumentalitics. a ribbon vibrator and ribbon spools on theshiftable support, an escapement dog rock-er on the shiftable support,separable operating connections between the universal bar and saidribbon vibrator and spools and dog rocker, a space bar on the mainframe, means forming a separable operating connect ion between saidspace bar and dog rocker wholly independent of the connection betweenthe universal bar and dog rocker, and h y-operated case-shift means onthe main frame for moving the carriage support and dog rocker and a partof each of said separable operating connections in unison withoutdisconnecting the separable parts of the several connections.

6. In a typewriting machine, the combination of a platen carriage, acase-shift frame for the carriage, key-operated means for shifting saidshift frame, a main frame, printing instrumentalities, a dog rocker.shiftable with the platen carriage, rock arm mounted on the shift frameto shift. therewith and connected to operate the dog rocker, a space keyon the main frame, means operable solely by said space key for rockingsaid arm relatively to the shift frame in all case positions of theshift frame, a universal bar mounted on the main frame operable solelyby the printing instrumentalities, and means operated by the universalbar for actuating the dog rocker in all case positions of the shiftframe.

7. In a typewriting machine, the c0mbi nation of a platen carriage, acase-shift frame for the carriage, key-operated means for shifting saidshift frame, a main frame, printing instrumentalities, a dog rockershiftable with the platen carriage, a rock arm mounted on the shiftframe to shift therewith and connected to operate the dog rocker, aspace key on the main frame, means operable solely by said space key forrocking said arm relatively to the shift frame in all case positions ofthe shift frame, and means operable solely by the printinginstrumentalities for actuating the dog rocker in all case positions ofthe shift frame, said last-mentioned means comprising constantlyconnected relatively shiftable parts mounted on the main frame and shiftframe respectively.

8. In a typewriting machine, the combination of a main frame, a platencarriage, a vertically shiftable support for the carriage, an escapementdog rocker pivot-ally held to said support intermediate its ends toswing horizontally and extending transversely of the machine,key-operated printing instrumentalities on the main frame, a universalbar on the main frame operable by the printing instrumentalities, meanson the shiftable support operable by the universal bar adapted to engagethe'forward edge of the dog rocker at the inner side of its pivot andpush the inner end of the rocker rearwardly when a printing key isdepressed, a spacebar on the main frame, means on the shiftable supportoperable by the space bar adapted to engage the rear edge of the dogrocker at the outer side of its pivot and push the outer .end of therocker forwardly when the space bar is depressed, a rack 'on thecarriage, feed dogs on saidrocker cooperating with said rack to controlletter-feed. movements of the carriage, and shift-keyoperated means forshifting the carriage support vertically.

9. In a typewriting machine, the combination of a main frame, a platencarriage, a vertically shiftable support for the carriage, anescapeinent dog rocker pivotally held to said support intermediate itsends to swing horizontally and extending transversely of the machine,key-operated printing instrumcntalities on the main frame, a universalbar on the main frame operable by the print ing instrumentalities, meanson the shiftable support operable by the universal bar adapted to engagethe forward edge of the dog rocker at the inner side of its pivot andpush the inner end of the rocker rearwardly when a printing key isdepressed, an upstanding rock arm pivotally held to the shiftable support at its lower end and engaging behind the dog rocker at the outerside of the pivot of said rocker, a rock shaft journalled on the mainframe, an upstanding rock arm rigidly held on said shaft at its lowerend, a

rigid link connecting said upstanding rock arms, spacing levers rigidlyheld to said rock shaft, a space bar supported on said levers, andshift-key-operated means for shifting the carriage support.

10. In a typewriting machine, the combi nation of a main frame, a platencarriage, a vertically shiftable support for the carriage, an escapementdog rocker pivotally held to said support intermediate its ends to swinghorizontally and extending transversely of the machine, key-operatedprinting instrumentalities on the main frame, a universal bar on themain frame operable by the printing instrumentalities, means on theshiftable support operable by the universal bar adapted to engage theforward edge of the dog rocker at the inner side of its pivot and pushthe inner end of the rocker rearwardly when a printing key is depressed,an upstanding rock arm pivotally held to the shiftable support at itslower end and engaging behind the dog rocker at the outer side of thepivot of said rocker, a rock shaft journalled on the main frame,anupstanding rock arm rigidly held on said shaft at its lower end, arigid link connecting said upstanding rock arms, spacing levers rigidlyheld to said rock shaft, a space bar ,supported on said levers,shift-key-operated means for shifting the carriage support, and

a return spring connected with one of said spacing levers for restoringthe rock arms and space bar to normal position.

11. In a typewriting machine, the combination of a main frame, a platencarriage, a vertically shiftable carriage support, an escapement dogrocker pivotally mounted on the shiftable support, a space bar, leverssupporting said space bar at their forward ends, a transverse rock shaftmounted on the said frame to which the leversare rigidly held,

an upstanding rock arm-rigidly'held at its I lower end to said rockshaft, an upstanding dog rocker actuator at the rear of said rock armloosely engaging behind a part of the dog rocker, means pivotallysupportlng said actuator at its lower end on the shiftable support toswing fore and aft of the machine, and a link connecting the rock armand actuator.

12. In a typewriting machine, the combination of a pivotally supportedescapement-dog rocker, a space bar, levers supporting said space bar attheir forward ends, a transverse rock shaft to which the levers arerigidly held, an upstanding rock arm rigidly held at its lower end tosaid rock shaft, an upstanding dog rocker actuator at the rear of saidrock arm loosely engaging the dog rocker, means pivotally supportingsaid actuator at its lower end to swing fore and aft of the machine, alink connecting the rock arm and actuator, one of said levers extendingrearwardly beyond the rock shaft, a

spring connecting the rearwardly extended arm of said lever with themachine frame and normally tending to pull said arm downward, and means'on the machine frame under said arm of the lever for limiting thedownward movement of said lever arm.

13. In a typewriting machine, the combination of a pivotally supportedescape ment-dog rocker, a space bar, levers supporting said space bar attheir forward ends, a transverse rock shaft'to which the levers arerigidly held, an upstanding rock arm rigidly held at its lower end tosaid rock shaft and having a rearwardly and downwardly turned partat itsfree end bendable fore and aft of the machine, an upstanding dog rockeractuator at the rear of said rock arm loosely engaging the dog rocker,means I pivotally supporting said actuator at its lower end to swingfore and aft of the machine, and a link connecting the bendable part ofthe rock arm and actuator.

14. In a typewriting machine, the combination of a main frame, a shiftframe, a platen carriage on the shift frame, escapement mechanism forthe carriage including a dog rocker pivoted on the shift frame, ribbonvibrating mechanism, a universal bar mechanism for actuating the dogrocker and ribbon vibrating mechanism, a space bar, levers extendingfore and aft of the main frame and supporting said space bar at theirforward ends, a rock shaft to which said levers are fixed ournalled onthe main frame and extending transversely of said frame, an upstandingrock arm fixed on said shaft at its lower end, an upstanding dog rockeractuator pivotally mounted at its lower end on the shift frame to therear of said. rock arm and loosely engaging the dog rocker, a linkconnecting the rock arm and actuator, a return spring connected with oneof the spacing levers, and a stop on the main frame arranged to beengaged by one of the spacing levers to determine the normal position ofthe space bar and actuator.

15. In a typewriting machine, the combination of a shiftable frame part,a platen carriage and dog rocker on said shiftable frame part, anupstanding dog rocker actuator pivotally held to said shiftable framepart at its lower end to swing fore and aft of the machine and engagingbehind the.

dog rocker at its upper end, shift-key-operated means for elevating theshiftable frame part, a main frame part, a rock shaft journalled on themain frame part, an upstanding rock arm rigidly held to said shaft, a.link connecting said arm and actuator adapted to swing vertically duringcase-shift movements of the shiftable frame part, spacing levers rigidlyheld to the rock shaft, and a space bar carried by said spacing levers.

16. In a typewriting machine, the combination of a main frame, a platencarriage shiftable in an up-and-down direction to change case,shift-key-operated means for shifting the carriage, printinginstrumentalities, a feed-dog rocker mounted to partake of thecase-shift movements of the carriage, two independent pivotallysupported clog-rocker actuators also mounted to partake of thecase-shift movements of the carriage, each of said actuators looselyengaging the dogrocker to operate the rocker without moving the otheractuator, a universal bar controlled by the printing instrumentalitiesoperatively connected to swing one of said actuators in all casepositions of the carriage, a space bar, a swinging member operable bythe space bar, and a link extending fore and aft of the machinepivotally connected at its ends to said member and the other dog-rockeractuator, said universal bar and the space bar and swinging member beingmounted on the main frame and said link swinging up and down duringcase-- shift movements of the carriage.

17. In a typewriting machine, the combination of a case shift frame fora platen carriage, rack and dog escapement mechanism shiftable with saidframe, apair of independent actuators for the escapement mechanismshiftable with the shift frame, independent space-key and character-keycontrolled devices on the main frame of the machine each connected witha difiierent one of said actuators for operating its associated actuatoralone.

18. In a typewriting machine, the combination of a case shift frame fora platen carriage, rack and dog escapement mechanism shiftable with saidframe, a pair of independent actuators forthe escapement mechanismshiftable with the shift frame, independent space-key and character-keycontrolled devices on the main frame of-the machine each connected witha different one of said actuators for operating its associated actuatoralone, each of said actuators being arranged to loosely engage a part ofthe escapement mechanism and shift the same without transmitting motionto the other actuator. I

19. In a typewriting machine, the combination of a case shift frame fora platen carriage, rack and dog escapement mechanism shiftable with saidframe, a pair of inclependentactuators for the escapement mechanismshiftable with the shift frame, independent space-key and character-keycontrolled devices on the main frame of the I machine each connectedwith a different one of said actuators for operating its associatedactuato alone, said actuators loosely engaging a pivoted controllingelement of the escap'ement at opposite sides of said element and atopposite sides of the pivotal axis of the element.

20. In a typewriting machine, the combination of a main frame, a platencarriage, a shift frame supporting said carriage,

mechanism for case-shifting the shift frame, a

a carriage escapement partaking of case-shift movements of the carriage,universal bar mechanism for actuating the escapement including a partmounted on the shift frame and arranged to engage a part of said shiftframe to determine the normal position of the parts of said universalbar mechanism, and space bar mechanism for actuating the escapementindependently of the universal bar mechanism and including a partmounted on the main frame and arranged to engage apartof the case shiftmechanism for determining the "normal position of the parts of saidspace bar mechanism.

21. In a typewriting machine, the combination of a case shift mechanismincluding a key-operated rock shaft for transmitting motion to the partto be shifted, a space bar supporting lever, and a return spring forsaid lever normally rocking the lever into engagement with said rockshaft.

22. In a typewriting machine, the combination of an 'escapementactuator, a space bar, means forming an operating connection betweensald bar and actuator, a case-shift mechanism lncluding a key-operatedrock shaft, and a return spring arranged to normally urge a part of theconnecting means into engagement with said shaft, whereby said shaftacts as a stop to determine the normal positions of the space bar andactuator.

23. In a typewriting machine, the combination of a main frame, 'a platencarriage, a case shift frame upon which saidcarriage is mounted, anescapement for the carriage including a dog rocker pivotally supportedon the shift frame, ribbon vibrating means shiftable with the carriage,printing instrumentalities, a universal bar mounted on the main frameand operable by the printing instrumentalities, an actuator mounted onthe shift frame-for actuating the do'g'rocker and ribbon vibratingmeans, a space bar supported on the main frame, a second actuatormounted'on the shift frame for actuating the dog rocker withoutimparting movement to the ribbon vibrating means and universal bar, saidactuators being supported wholly on the shift frame for movement bodilywith said frame, operating means connecting the universal bar with t-hefirst mentioned act-uator in all case positions of the shiftframe, andoperating means connecting the space bar with the second actuator inallcase positions of the shift frame.

24;. In a typewriting machine, the combination of a carriage escapement,a pivot member, an escapement actuating lever having an open pivotbearing through which said pivot member extends, a part having a ilXedrelation with said pivot member, said lever having a slot thereinextending in the direction of its pivotal motion, and a retaining devicedetaohably held to said part having a shank extending through said slotand having a head (to-operating With said part to prevent lateralmovement of the lever, the shank of said retaining device serving to ingin the lever.

In testimony whereof I hereunto affix my signature.

HENRY ALLEN AVERY.

